HP Web Jetadmin Software Instrukcja Użytkownika Pobierz pdf (Strona 162)

passive SLP is enabled, some devices may be found by this type of discovery even if you do not initiate a

discovery.

Discovering Devices with HP Web Jetadmin through Firewalls

Although rewalls provide a secure perimeter for business resources, they can also present a barrier to software

products. HP Web Jetadmin provides the ability to discover and manage devices throughout a business network.

HP Web Jetadmin uses Multicast and SLP techniques to discover devices on your network. Using standard

rewall congurations, multicasts are typically blocked because the communication port on which it relies is

blocked. To facilitate a broadcast discovery such as Multicast and SLP, HP Web Jetadmin uses the well-known

static port, UDP port number 427. To enable this discovery technique, the machine running HP Web Jetadmin

must unblock the port used from within the rewall settings.

Discovery Types and Methods

HP Web Jetadmin performs the following types of discoveries:

●

Network-connected device discoveries—HP Web Jetadmin nds a network node and then sends SNMP

queries to discover the devices that are connected directly to that network node. After the SNMP query

resolves a device, the device is displayed in the All Devices list. Resolved devices can include HP Jetdirect-

connected devices, third-party devices, HP network scanners, HP network projectors, and so on. For more

information, see Network-Connected Device Discoveries on page 136.

●

PC-connected device discoveries—HP Web Jetadmin nds PCs and then discovers the devices that are

connected to an LPT port or USB port on those PCs. HP SNMP Proxy Agent is a small software package that

facilitates communication between HP Web Jetadmin and the PC-connected devices. If HP SNMP Proxy

Agent is installed on the PC, HP Web Jetadmin gathers detailed information about the connected devices. If

HP SNMP Proxy Agent is not installed on the PC, HP Web Jetadmin gathers only a minimal amount of device

information about the connected devices. For more information, see PC-Connected Device Discoveries

on page 137.

Most of the discovery methods are available for both network-connected discoveries and PC-connected

discoveries. The following table identies whether a discovery method can be selected for each discovery type.

Discovery method Network-connected device discoveries PC-connected device discoveries

Quick Device Discovery on page 139 Yes No

SLP Multicast Discovery on page 140 Yes No

IP Broadcast Discovery on page 141 Yes Yes

IP Range Discovery on page 142 Yes Yes

Specied Device Address Discovery

on page 147

Yes Yes

Active Directory Discovery on page 149 Yes Yes

Domain Discovery on page 151 No Yes

WS-Discovery on page 152 Yes Yes

136 Chapter 3 Device Management ENWW

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